Vibrating machine



` 1,615 052 Jan. 18, 1927- R C, s-ruBBs 31a/vanto@ ROBERT G Srusatroz "E13 A atent dan. 18, 1927. UTED STATES PATENT OFFICE.

ROBERT C. STUBBS, F DALLAS, TEXAS.

VIBRATING MACHINE.

Application filed November 21, 1925. Serial No. 70,511l

My invention relates to vibrating machines and more particularly to vibrating machines for solidifying concrete structures, such as paving for streets, roads and the like; and the object is to provide out-0fbalancing devices. for increasing the vibrations or decreasing the vibrations per minute and for holding the out-of-balancing devices at whatever position or point of adjustment that may be required on the work to be done. Other objects and advantages will be fully explained in the following description 'and 4the invention will be Imore particularly pointed out in the claims.

Reference is had t0 the accompanying drawings which form a part of this application.

Fig. 1 is a front elevation of a vibrating machine provided with the out-of-balancing devices shown in section.

Fig. 2 is a cross-section of the out-of-balancing cylinders, showing the weightedor heavy sides of the two cylinders 1n perfect balance.

Fig. 3 is a similar view, but showing the heavy sides of the cylinders shifted to outof-balance positions.

Fig. 4 is a similar view, but showing both heavy sides adjacent to each other for creating the maximum out-of-balance force, the centrifugal force of both heavy sides pulling in the same direction.

Similar characters of reference are used to indicate the same parts throughout the several views. v

The drawings show a motor provided with a crank-case 1in which is journaled a crank-shaft 2,which .is to be ydriven by the motor. A. rectangular frame 3 is rigidly attached to the motor base 4. A shaft 5 is journaled in the frame 3 for the out-of-balancing cylinders 6 and 7 The inner cylinder 6 may be keyed or otherwise made rigid with the shaft 5. Sprocket wheels 8 and 9 are rigid respectively with the shafts 2 and 5. A chain 10 is mounted 0n the wheels 8 and 9 so that themotor driven `wheel 8 will drive the chain 1() for .driving the wheel 9 and shaft In operation, the wheel 9 is rigidwith the shaft 5. The wheel 9 is loosely mounted on the shaft 5 and is lmade rigid therewith by clutch members. The clutch member 1l is formed on the vhub of wheel 9 and the clutch member 12 is formed on a sleeve which carries a collar 13. The collar 13 is slidably mounted on the shaft 5 by a lug which operates in a slot 14 in the shaft so that the clutch member 12 must rotate with the shaft 5. The clutch is thrown in and out of mesh by lever 15 which is jprovided with a fulcrum 16 which is mounted on the casing or frame 3. A friction clutch 17 may be fulcrumed on the frame 8 for bearing against the periphery of the cylinder 7 for causing the cylinder 65 7 to run slower or stop as soon as required.

The cylinders 6 and 7 may be locked together by a set screw 18 which is countersunk in the periphery of the cylinder 7. The

cylinder 6 may be provided with a plurality 70 of screw sockets 19 for the screw 18. The cylinders 6 and 7 are driven from the Shaft 2 which is provided with balance wheels 20. Approximately one half of each cylinder, 6 and 7, is weighted by makin the circumferential area thic er from one end to end than the other half. The object is to make the cylinders of approximately the same weight and to make the heavy side one-half of of the inner cylinder equal in weight to the 30 heavy side of the outer cylinder and to make the light side of the inner cylinder equal in weight to the light side of the outer cylinder. The outer cylinder may be held stationar desira le. This may be done by removing the screw 18 and applying the friction brake 17. This would accomplish an out-of-ball ance effect, but the out-of-balance effect is or while the inner cylinder revolves if 35V may be generally accomplished by a shifting of the light and heavy sides of the cylinders relative to each other. The cylinders can be held at any desired points of adjustment by the screw 18 and the sockets 19.

The effect of the out-of-balance elements is A be transmitted through the frame to rollers 21 and the rollers 2l will transmit the vibrations to the transmission unit which consists of stringers 22 to which are attached cleats 23. The cleats 23 and the stringere 22 make a platform for pressing the concrete or other plastic down and there must be sulicient spaces between the several strips and cleats to permit the air and surplus moisture or mortar to escape while the mass is being vibrated by the machine and the weight of the entire machine furnishes the necessary pressure.

i What I claim, is,-

1. In a vibrating machine rovided with a driven shaft and balance w eels thereon;

`to create vibrationsand the vibrations will v a vibrating element consisting of a shaft, bearings for said shaft rigid with the vibrating machine, an inner cylinder rigid with said transmitting shaft and having a heavy side and a light side, an outer c linder mounted on said inner cylinder an means for detachably connecting the outer cylinder to said inner cylinder, said outer cylinder having a light side and a heavy side, and means for driving said transmitting shaft from said driven shaft.

2. In a vibrating machine provided With a driven crank shaft and balance lWheels thereon; a vibrating element consisting of a shaft and bearings therefor rigid with the vibrating machine, an inner cylinder rigid therewith and having a heavy side and a light side, an outercylinder having aV heavy side and a light side mounted on said inner cylinder, means for detachably and adjustably connecting the outer ,cylinder to the inner cylinder, means for driving said vi brating shaft from said crank shaft, and means for transmitting the vibrations of said shaft to mass of material to be solidified as it is compacted.

3. In a vibrating machine provided with a driven crank shaft and balance Wheels thereon; an but-of-balance element for creating vibrations consisting of inner and outer cylinders movable peripherally relative to each other and each having a heavy side and a light side, means for driving said element from said shaft, and means for transmitting the vibrations from said vibrating element to the mass of material to be compacted and cylinder and detachab-ly connected thereto,

means for driving said vibrating shaft from said driven shaft, and means for transmitting the 'vibrations from said shaft to the U0 mass of material to be compacted and solidified.

5. In a vibrating machine provided With a frame'and a driven shaft journaled in said frame; an out-of-balance element for creating vibrations consisting of inner and outer cylinders shiftable peripherally rela'- tively to each other and provided With light and heavy sides, means for detachably connecting said cylinders to each other, a shaft for said cylinders adapted to be driven from said driven shaft, gearing for operatively connecting said shafts for operating purposes, andvmeans for transmiittng the vibrations of said vibrating shaft to the material to be compacted and solidied.

6. In a vibrating machine provided With a driven crank shaft and balance Wheels thereon; an out-of-balance element for creating vibrations consisting of inner and outer, cylinders of approximaetly equal Weight and each having a periphery of unbalanced sides, and means operatively connected to said balance Wheels and to said outof-balance element for driving the latter.

7. In a vibrating machine provided With a frame and a driven crank shaft and balance Wheels thereon; an out-of-balance element for creating vibrations in said frame, means for actuating said out-ofbalance elements from said Wheels, and means for transmitting the vibrations of said frame to the mass of material to be compacted and solidified.

8. In a vibrating machine provided With a frame and a driven crank shaft and balance wheels thereon; an out-of-balance element for creating vibrations in said frame, means interposed between said out-of-balance element and said shaft and actuated by said shaft for operating said element, and means for transmitting the vibrations of said frame to the mass of material to be compacted and solidified.

In testimony whereof, 'I set my hand this 20th day of June, 1925.

ROBERT C. STUBBS. 

